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Leak Monitoring Plan <br /> Underground Storage Tank Facility <br /> Facility Mobil Service Station #787 4 .i`�'iY,'; <br /> 950 West 11th Street, Tracy 95376 <br /> Tankowner Desert Petroleum, Inc. <br /> 2060 Knoll Drive, Ventura, CA 93003 <br /> P.O. Box 1601, Oxnard, CA 93032 HrLTH <br /> C-_N t��E::��t�1��C„t�� <br /> Tank Facility Description <br /> Three underground storage tanks, one of 10,000 gallon, one 7,500 <br /> gallon, and one 5,000 capacity. All tanks are 1/4" single walled <br /> carbon steel with 2" galvanized product piping. Storage does not <br /> have secondary containment or cathodic protection at present. <br /> The current and past materials stored are motor fuel gasolines. <br /> There have been no unauthorized product releases detected in the <br /> past. Product piping from the storage tanks is pressurized and <br /> is equipped with in-line leak detectors. An existing waste oil <br /> tank is 280 gallons. This tank is to be removed. Preventive <br /> maintenance is scheduled for the existing underground tanks and <br /> product piping by replacing the present galvanized piping with <br /> new 2" fiberglass. The storage tanks are to be relined with an <br /> approved epoxy fiberglass lining prior to installing monitoring <br /> equipment. <br /> Proposed Monitoring System <br /> 1. The monitoring alternative selected from State Monitoring <br /> Alternatives for Existing Fuel Tanks is number 6. The monitoring <br /> plan proposed consists of: <br /> a. Vadose Well Monitoring <br /> b. Inventory Reconciliation <br /> c. Tank Testing <br /> d. Piping Leak Detectors <br /> e. Overspill Protection <br /> Vadose Monitoring System and Inventory Reconciliation <br /> We request approval of a Vadose Well Monitoring System using <br /> electronic probe detection along with a product line monitor <br /> produced by Redjacket Electronics (Marley Pump Company) . The <br /> probe system is programmed in parts per million threshold levels <br /> for each probe and has an alarm that displays ppms present. The <br /> system features a visual and audible alarm with an alarm memory. <br />